JP2008177453A - Winding structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a winding structure with which insulation distance between windings can be secured. <P>SOLUTION: A coil wining 1 is formed of a metal plate, wherein the winding is obtained by forming a shape in which almost annular winding plates 2, 3 and a half-arc half-winding plate 4 are mutually connected. On the inner radius sides of winding portions 6, 26 and of a half-winding portion 15, tabs 11, 16 and 31 are formed, respectively. When the coil winding 1 is mounted on an E-shaped core 40, tabs 11, 16 and 31 are bumped against the center leg of the E-shaped core 40, resulting in keeping a distance of a size of the tabs 11, etc. between the inner radius portions except the tabs 11, etc. of the winding plates 2, 3 and of the half-winding plate 4 and the center leg, and consequently securing a creeping distance in the horizontal direction. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a winding structure in which a conductive member is wound and attached to a core.

  For example, an inductance element such as a transformer or a choke is used in a power supply device represented by a switching power supply device. Such an inductance element is generally configured by winding a winding made of a conductive member around a core formed by sintering a magnetic material, and a spiral metal plate or a plurality of annular metal plates are spirally wound. One having a winding structure connected in a shape is well known.

For example, in Patent Document 1, a metal plate is punched out so that at least one circular portion and another same circular portion are connected, and a tangent line between the circular portion and the circular portion is alternately bent into a mountain or a valley. Such a winding structure is disclosed. In the winding structure, the insulation between the windings is performed by putting an insulating plate between the circular portions of the circular portion and overlapping each other, and the insulation between the winding and the central leg of the core is performed by winding. This is done by covering the side peripheral surface of the central leg inserted through the central hole with an insulating cylinder made of an insulating material.
JP-A-6-77077

  However, when laminating the plate-like winding and the insulating plate as disclosed in the above-mentioned Patent Document 1, particularly in the case where the inner diameter is a circle, the plate-like winding is in direct contact with the insulating cylinder at the center of the core, Since the creeping distance between the adjacent plate windings is not ensured through the insulating plate, the insulating distance is substantially equal to the thickness of the insulating plate.

  In view of the above problems, an object of the present invention is to provide a winding structure that can secure an insulation distance between windings.

  In the winding structure according to claim 1 of the present invention, in a winding structure in which a winding body having a winding portion wound around a core and an insulating member are laminated, the winding portion comes into contact with the core. Protrusions are provided.

  In this way, by projecting the projecting piece against the core, the portion other than the projecting piece in the winding body is separated by the size (projection amount) of the projecting piece, and the creeping distance can be secured in the horizontal direction.

  In the winding structure according to a second aspect of the present invention, the protruding piece is provided at a position that does not overlap with another protruding piece provided in another winding portion.

  If it does in this way, each protrusion will not overlap and it can ensure the creeping distance of a perpendicular direction with respect to these protrusions.

  According to claim 1 of the present invention, it is possible to provide a winding structure capable of ensuring an insulation distance between the windings.

  According to the second aspect of the present invention, it is possible to secure an insulation distance between the projecting pieces provided in adjacent windings.

  Preferred embodiments of the winding structure according to the present invention will be described below with reference to the accompanying drawings. In addition, the same code | symbol is attached | subjected to the same location and description of a common part overlaps and it abbreviate | omits as much as possible.

  FIG. 1 is a plan view showing the shape of the coil winding before assembly in the first embodiment.

  The coil winding 1 is formed of a conductive metal plate represented by, for example, copper, brass, etc., and is subjected to mechanical processing such as punching (cutting) or wire cutting so as to form a substantially annular winding. This is obtained by connecting the wire plates 2 and 3 and the semi-arc-shaped half-winding plate 4 to each other. The winding plates 2 and 3 and the half winding plate 4 correspond to a winding body. In this embodiment, the coil winding 1 includes two winding plates 2 and 3 corresponding to a winding of about one turn and one half winding corresponding to a winding of about a half turn (about 0.5 turns). Since the plate 4 is connected, the coil winding 1 as a whole corresponds to a winding of about 2.5 turns.

  The winding plate 2 has a winding portion 6 formed in a substantially ring shape with a through hole 5 opened in the center as a main portion, and a cutout 7 communicating with the through hole 5 is wound around a part of the winding portion 6. By being provided in the radial direction from the center of the mounting part 6 (in the lower right direction in FIG. 1), the winding part 6 is a substantially C-shaped discontinuous ring having a pair of opposed end parts. Of the pair of end portions, one end portion projects outward and is provided with a connecting portion 8 with the half-winding plate 4, and the other end portion extends slightly outward after A terminal portion 9 is provided that extends in the extension line direction of one end portion. The terminal portion 9 is formed with connection holes 10 and 10 through which a connection member such as a screw can be inserted for electrical connection with another coil winding 1 or another circuit member. Of course, the terminal portion 9 can also be electrically connected to other circuit members by, for example, soldering. Further, two tabs 11, 11 as projecting pieces are provided facing each other on the inner peripheral side of the winding portion 6 that is an opening of the through hole 5.

  The winding plate 3 has a winding portion 26 formed in a substantially ring shape with a through hole 25 opened in the center as a main portion, and a cutout 27 communicating with the through hole 25 is wound around a part of the winding portion 26. By being provided in the radial direction (the lower left direction in FIG. 1) from the center of the mounting portion 26, the winding portion 26 has a substantially C-shaped discontinuous annular shape having a pair of opposed end portions. Of the pair of end portions, one end portion protrudes outwardly and is provided with a connecting portion 28 with the half-winding plate 24, and the other end portion is slightly extended outwardly after A terminal portion 29 extending in the direction of the extension line of one end portion is provided. The terminal portion 29 is formed with connection holes 30 and 30 through which a connection member such as a screw can be inserted to be electrically connected to another coil winding 1 or another circuit member. Further, two tabs 31, 31 as projecting pieces are provided facing each other on the inner peripheral side of the winding portion 26 that is an opening of the through hole 25. That is, the winding plate 3 has a mirror-symmetric shape of the winding plate 2.

  The half-winding plate 4 has a substantially semi-arc-shaped half-winding portion 15 formed integrally between the connecting portion 8 of the winding plate 2 and the connecting portion 28 of the winding plate 3. Two tabs 16 and 16 as projecting pieces are provided on the inner peripheral side of the semi-winding portion 15 so as to face each other. The tabs 16 and 16 are provided on the inner peripheral side of the semi-winding portion 15 that is coupled to the connecting portions 8 and 28. The straight line connecting the tabs 16 and 16 is the tab 11 or 11 or the tab 31. , 31 are perpendicular to the straight line connecting the two.

  Mark holes 17 and 17 are formed at intermediate positions of the connecting portion 8 that connects the winding plate 2 and the half-winding plate 4, and a line connecting the mark holes 17 and 17 is a folding line of the connecting portion 8. Represents. Similarly, mark holes 18 and 18 representing folding lines are formed at intermediate positions of the connecting portion 28 that connects the winding plate 3 and the half winding plate 4. Then, by folding the connecting portion 8 at the folding line, folding the connecting portion 28 at the valley, and superimposing the winding plate 2, the half winding plate 4 and the winding plate 3 so as to form a spiral, The winding state shown in FIGS. 2 and 3 is obtained. At this time, the winding portion 6 of the winding plate 2, the half winding portion 15 of the half winding plate 4, and the winding portion 26 of the winding plate 3 overlap on a coaxial circle, but are formed on these. Tab 11 or tab 31 and tab 16 do not overlap.

  FIG. 4 is an exploded perspective view showing the structure of the choke coil provided with the coil winding 1. In the figure, the choke coil is composed of a coil winding 1 and a pair of E-shaped cores 40, 40 formed by sintering a magnetic material. The E-shaped cores 40 and 40 are formed by projecting a flat plate-shaped main portion 41, a columnar central leg 42 at the center of one side, and outer wall legs 43 and 43 at both ends of the one side. The In the coil winding 1, an insulating plate 45 as an insulating member is disposed between the winding plate 2 and the half winding plate 4 and between the half winding plate 4 and the winding plate 3. Insulate. The insulating plate 45 has an annular shape that is substantially the same shape and size as the winding portions 6 and 26 of the winding plates 2 and 3, and the inner diameter thereof is longer than that of the winding portions 6 and 26. The diameter is reduced.

  As a procedure for assembling the choke coil, a plurality of primary windings 1 are overlapped in an insulated state on the upper and lower sides of the primary winding 1 via insulating plates, and insulating plates 45 are disposed on the upper and lower sides thereof. An insulating cylinder 46 formed by forming an insulating material into a cylindrical shape is placed on the center leg 42 of the E-shaped core 40. The center legs 42 and 42 of the E-shaped cores 40 and 40 are inserted into the through holes 25 from above and below so that the plurality of primary windings 1 arranged on the same axis are sandwiched by the E-shaped cores 40 and 40, respectively. Then, the center legs 42, 42 of the opposing E-shaped cores 40, 40 and the outer wall legs 43, 43 are brought into contact with each other to obtain the assembly shown in FIG. The choke coil shown in FIG. 5 is connected to a bus bar 51 as another circuit member by a screw 50 inserted through a connection hole 10 formed in the terminal portion 9.

  The characteristic structure of the coil winding 1 is that the tabs 11, 16, and 31 for keeping the insulation distance are arranged at different positions on the circumference of the inner diameter of the winding plates 2 and 3 and the half winding plate 4. In other words, the winding plates 2 and 3 and the half winding plate 4 and the insulating plate 45 are alternately laminated. When the E-shaped core 40 is mounted on the coil winding 1, the winding plates 2, 3, and half are formed by abutting the tabs 11, 16, 31 against the side peripheral surface of the central leg 42 covered with the insulating cylinder 46. The inner diameter portions other than the tabs 11 etc. in the winding plate 4 are separated by the size (projection amount) of the tabs 11 etc., and a creepage distance can be secured in the horizontal direction. Further, regarding the vertical direction of the stack, the tabs 11 and 31 and the tab 16 are arranged at different angles, so that the upper and lower tab positions do not overlap, and the tabs are perpendicular to each other. Creepage distance can be secured. Since the insulation between the winding plate 2 and the half winding plate 4 and the half winding plate 4 and the winding plate 3 themselves adjacent to each other is secured by the insulating plate 45, the insulation distance is equal to the creepage distance. Become. That is, an insulation distance corresponding to the length of twice the tab size (the length obtained by adding the protruding amount of each of the tabs 11 and 16 or the tabs 16 and 31) + the thickness of the insulating plate 45 is secured. Therefore, the insulation distance can be secured by the tab size without depending on the thickness of the insulating plate 45 to be laminated.

  As a modification of the first embodiment, the tabs 11, 16, 31 may be provided on the outer peripheral side of the winding parts 6, 26 and the semi-winding part 15. In this case, when the E-shaped core 40 is mounted on the coil winding 1, the winding plates 2, 3, and half winding are formed by abutting the tabs 11, 16, and 31 against the inner surface of the outer wall leg 43 in an insulated state. The outer diameter portions of the plate 4 other than the tabs 11 and the like are separated by the size (projection amount) of the tabs 11 and the like, and a creeping distance can be secured in the horizontal direction.

  As described above, in the coil winding 1 of the first embodiment, the winding plates 2 and 3 as winding bodies having the winding portions 6 and 26 and the half winding portion 15 wound around the E-shaped core 40. In the winding structure in which the half-winding plate 4 and the insulating plate 45 as an insulating member are laminated, a tab as a projecting piece that abuts the E-shaped core 40 on the winding parts 6, 26 and the half-winding part 15 11, 16, 31 are provided.

  In this way, the tabs 11, 16, 31 are abutted against the E-shaped core 40, so that portions other than the tabs 11, 16, 31 on the winding plates 2, 3 and the half winding plate 4 are tabs 11, 16, 31. The distance is 31 by the size (projection amount), and the creepage distance can be secured in the horizontal direction. Therefore, it is possible to provide a winding structure that can secure an insulation distance between the windings.

  In the winding structure according to claim 2 of the present invention, the tab 11 (tabs 16 and 31) is another tab 16 or tab provided in another winding part 26 (winding part 6) or half-winding part 15. It is provided at a position that does not overlap 31 (tab 11).

  If it does in this way, each tab 11,16,31 will not overlap, but the creeping distance of the orthogonal | vertical direction can be ensured with respect to these tabs 11,16,31. Therefore, it is possible to secure an insulation distance between the tabs 11, 16 and 31 provided on the adjacent winding plates 2 and 3 and the half winding plate 4.

  FIG. 6 is a plan view showing the shape of the coil winding before assembly in the second embodiment.

  The coil winding 100 has the same basic structure as that of the coil winding 1 in the first embodiment. In short, the number of the half-winding plates 4 is increased. The coil winding 1 is obtained by connecting the substantially annular winding plates 2 and 3 and the semi-arc-shaped half winding plates 101, 111, and 121. In this embodiment, the coil winding 1 The winding 100 includes two winding plates 2 and 3 corresponding to windings of about 1 turn and three half winding plates 101, 111 and 121 corresponding to windings of about half turns (about 0.5 turns). Therefore, the entire coil winding 100 corresponds to a winding of about 3.5 turns.

  The winding plate 2 has the same configuration as that described in the first embodiment, but in the second embodiment, the positions of the tabs 11 are different by 90 °. Further, the winding plate 3 has the same configuration as that described in the first embodiment.

  The half-winding plates 101, 111, and 121 have the same configuration as the half-winding plate 4, and a substantially semi-arc-shaped half-winding portion 102 that forms a main part of the half-winding plate 101 and the half-winding plate 111. Between the winding plate 2 and the winding plate 3, a substantially semi-arc-shaped half-winding portion 112 that forms a main part and a substantially semi-arc-shaped half-winding portion 122 that forms a main portion of the half-winding plate 121. It is integrally formed. Winding plate 2 and half-winding portion 102 are connected by connecting portion 8, half-winding portion 102 and half-winding portion 112 are connected by connecting portion 104, and half-winding portion 112 and half-winding portion 122 are connected. Are connected by a connecting portion 106, and the semi-winding portion 122 and the winding plate 3 are connected by a connecting portion 28. A tab 103 as a protruding piece is provided on the inner peripheral side of the semi-winding portion 102, and a tab 113 as a protruding piece is provided on the inner peripheral side of the semi-winding portion 112. On the inner peripheral side, two tabs 123 as protruding pieces are provided to face each other.

  Mark holes 105, 105 and mark holes 107, 107 are formed at intermediate positions between the connecting portions 104, 106, respectively, and a line connecting the mark holes 105, 105 or the mark holes 107, 107 is connected to each connecting portion 104. , 106 represents the fold line. Then, the connecting portion 8 is folded at the folding line, the connecting portion 104 is folded, the connecting portion 106 is folded, the connecting portion 28 is folded, and the winding plate 2 and the half-winding plates 101, 111, 121 are folded. 7 and the winding plate 3 are superposed so as to form a spiral, the winding state shown in FIG. 7 is obtained. At this time, the winding portion 6 of the winding plate 2, the half winding portion 102 of the half winding plate 101, the half winding portion 112 of the half winding plate 111, and the half winding portion of the half winding plate 121. 122 and the winding portion 26 of the winding plate 3 overlap each other on a coaxial circle, but are provided at positions where they do not overlap with the tabs 11, 31, 103, 113, and 123 formed thereon. However, in the case shown in FIGS. 6 and 7, the tab 11 and the tab 123 are provided at the overlapping positions.

  As described above, in the second embodiment, the winding plates 2, 3 as winding bodies having the winding portions 6, 26 wound around the E-shaped core 40 and the half winding portions 102, 112, 122, and In a winding structure formed by laminating half-winding plates 101, 111, 121 and an insulating plate 45 as an insulating member, half-winding portions 102, 112, 122 that constitute a part of one turn in the coil winding 100 A plurality of half-winding plates 101, 111, and 121 having stacked layers are connected in a stacked manner.

  In addition, this invention is not limited to the said Example, It can change in the range which does not deviate from the meaning of this invention. It goes without saying that the winding structure in the present invention is applicable to any inductance element having a winding such as a transformer. The shape, number, position, size, etc. of the projecting pieces may be designed as appropriate.

It is a top view which shows the state before the assembly of the coil winding which has a winding structure in 1st Example of this invention. It is a top view which shows the state after an assembly of a coil winding same as the above. It is a perspective view which shows the state after an assembly of a coil winding same as the above. It is a disassembled perspective view which shows the structure of the choke coil provided with the coil winding same as the above. It is a perspective view which shows a choke coil provided with coil winding same as the above. It is a top view which shows the state before the assembly of the coil winding which has a winding structure in 2nd Example of this invention. It is a perspective view which shows the state after an assembly of a coil winding same as the above.

Explanation of symbols

1 Coil winding 2, 3 Winding plate (winding body)
4 Half-winding plate (winding body)
6,26 Winding part
15 Half-winding part
11, 16, 31 tab (projection)
40 E core

Claims (2)

A winding structure in which a winding body having a winding portion wound around a core and an insulating member are laminated, and the winding portion is provided with a projecting piece that contacts the core. Construction. The winding structure according to claim 1, wherein the projecting piece is provided at a position that does not overlap with another projecting piece provided in another winding part.

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